Pith Number

pith:RRP34AJY

pith:2018:RRP34AJYQEKC7PC6IE66BKB5HA

not attested not anchored not stored refs pending

High-dimensional covariance matrix estimation using a low-rank and diagonal decomposition

Mu Zhu, Yilei Wu, Yingli Qin

arxiv:1802.06048 v1 · 2018-02-16 · stat.ME

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RRP34AJYQEKC7PC6IE66BKB5HA}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:23:10.049868Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c5fbe013881142fbc5e413de0a83d3830f7649d3c3ef35a293bf86f6cc653dc

Aliases

arxiv: 1802.06048 · arxiv_version: 1802.06048v1 · doi: 10.48550/arxiv.1802.06048 · pith_short_12: RRP34AJYQEKC · pith_short_16: RRP34AJYQEKC7PC6 · pith_short_8: RRP34AJY

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/RRP34AJYQEKC7PC6IE66BKB5HA \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 8c5fbe013881142fbc5e413de0a83d3830f7649d3c3ef35a293bf86f6cc653dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "77d6dbfd02e2660a7615ba386c5c6b0c779fbb024178baf0a99c448f7e70820a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2018-02-16T17:43:44Z",
    "title_canon_sha256": "a7450cd7569d7bd3a55e16eb96d1379d1b60b6e72e63e7ea8c821eea0d32101b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.06048",
    "kind": "arxiv",
    "version": 1
  }
}